Developing apparatus for photographic films



1,642,927 Sept 1927 M. JOSEPHO v DEVELOPING APPARATUS FOR PHOTOGRAPHIC FILMS I Filed Aug. 24 1926 2 Sheets-Sheet 1 II I 8 I I- II M W 6 HIIIHI a, k v Q 1 16 Ill 3 18 14 m! Q a H||H||\|| H 5 mljm 'z ly 3 4 K5 \5 i'y- I anon HEM 1,642,927 P 1927' A. M. JOSEPHO DEVELOPING APPARATUS FOR PHOTOGRAPHIC FILMS Filed A112. 24 1926 2 Sheets-Sheet 2 f1 xi I Patented Sept. 20, 1927 maror. m. JOSEPHO,

PATENT OFFICE.

01:" NEW YORK, N. Y.

DEVELOPING APPARATUS FOR PHOTQGRAPHIG FILMS. I

7 Application filed August 24, 1926. Serial No. 131,169.

I The object of the present invention is to provide a daylight developing apparatus for photographicfilnis, characterized by the fact that the device is adapted to receive the films from the film holder of a camera, such as a motion picture camera, and to wind in the film by rotation of a member of the receiving apparatus, a reverse rotation of said member serving to spread the film and separate its convolutions so that the entire emulsified surface of the film may be exposed to the developing liquid.

/ p A furthercharacteristic of the invention is the provision and means whereby the developing apparatus may be submer ed in a developing bath so that the deve oping fluid may pass into the device through passa es so formed as to bar the entrance 0 lig t. Thus the apparatus, after being submerged in one bath, may .be'removed therefrom and ass successfully to toning, fixing and other aths or washes without removing erenoe to the an the line 55, Fi

' line 4-4, Figu the film. Further objects of the invention will hereinafter appear.

The invention will be understood by refaccompanying drawing, in which- Figure 1 is an elevation of an embodiment of the invention, the vertical wall being partially broken away, and

igure i? is a similar plan view;

Figure 3 is a sectional elevation of the device; Figure 4 is a horizontal section on the re 3, and- Y re 5 1s a "partial horizontalsection gure 3. p p

The embodiment of the invention illustrated in the drawing consists of a cylin- Figu drical casing 1 which is received on a base member 2, the latter being provided with I supporting legs 3 so as to maintain the bottom wall of the base member in raised posi tion.

The base member 2 is formed with an axial aperture to receive the lower hub member 4 of a drum 4. Hub member 4 is provided with a depending threaded reduced end which receives a thumb-screw ornut 5. It will'be understood that the hub'member 4* will be so fitted within the aperture of base member 2 as to bar the entrance of light.

Drum 4- is provided with an upwardly projecting hub member 4 adapted to be received within theaxial aperture of a cap plate 6 Both the base member and the cap plate are provided with shoulders indicated at a against which the edges of the cylindrical casing 1 bear.

Hub member 4" of the drum is provided wlth a threaded opening to receive a shouldered threaded stud7, having at its upper end a thumb-piece 7. The shoulder 7"" of the thumb-piece serves to hold in position a knob 8,, the lower face of which engages hub member 4"" of drum'4 and extends over upon cap member 6. It will thus be seen if that the thumb-nut 5 and knob 8 (with the shouldered screw stud 7) serve to maintain the parts assembledand at. the same time there will be provided su'flicient clearance between the said two members and the adjacent surfaces of the cap plate and base member as to enable ready rotation of the drum without substantial -friction upon said base and cap members.

As shown in Figure formed in the casing 1 to permit the passage of the film, indicated at 9. The opening is closed against the entry of light by two pieces of soft rubber 10 which have meeting faces. In I the figu fragment of a film box 11, having an outlet projection 12 adapted to project within opening I). The outlet projection 12 also passes into the opening of plate 13 on casing 1. The plate is secured by the screws 14, which screws also secure small plates-14 and serve to hold the soft rubber pieces 10 in position.

In order to start the operation of the device, stud-screw 7 is removed together with knob 8 whereupon cap 6 may be removed, exposing the interior of the device. The

"film 9 then is passed into lateral c in drum 5, an opening 6 is re I have indicated a 4 and is clamped in position by the rotation of a cam 15. The upper end of cam 15 is squared for a key and provided with a thumb-piece so as to be readily rotated. It projects into an annular recess 4* at the top of the drum. I

is wound upon the drum and the outer end of the film passes into the drum. The drum is then givena reverse rotation which causes the outer free end of the film to meet the inner wall of the'casin'g either by friction or by engagement with the plates 14* or other stops which may be provided. Thus said outer end of the film is held whilst the drum I in its contin'uedreverse rotation spaces the convolutions of the film to permit the entry of the treating liquid throughout the film surface. p

The device is then placed in a container holding the liquid-which may be a developing solution, toning solution, washing bath, etc., in accordance with the desired treatment to be given. The film may be alternatel wound upon drum 4 andthen released y reverse. rotation of the drum whilst the device is in the bath. Thismay a formed in the cap and base members 2 and 6. Each opening 16 is in connection with the outer wall for annular channel 18. The, p I

.the casing and afi'ordmg a'bearing for the be found desirable in order to agitate the liquid, and to insure thorough treatment of the film.

The liquid enters the casing through an opening or a plurality ,of openings 16 a horizontal passageway 17 which discharges into an annular channel 18 formedin cap and base members 2 and 6, at the' outer edge thereof. The casing 1 serves as h uid flows along channel 18 until it meets a orizontal passageway 19 permitting the liquid to flow inwardly. Pasageway 19 is provided with outlets 20 leading to the in terior of the casing adjacent the drum 4.

.ent is as follows The base member 2 may be formed with the same passageways as those provided in the ca member, and a" further description thereo is unnecessary.

It will be understood tliat the passage-v .ways'in both the cap and base members will have non-reflecting surfaces. They may be coated with a black preparation which will absorb light. Thus, light passin through.

the opemngs 16 ma enter the orizontal' passagewa 17 butwlll not'be reflected back through 'i; e passageway 19 and into the casin 1. r

Having described my invention what I claim and desire to secure by Letters-Pat- 1. In developing apparatus for strips of photographic films or thelike, a casing, a drum adapted to rotate within the casing and means for conveying a liquid to the interior of the casing comprising reversal dinoted 1 and spaced ducts, one .of the nets having a communication with the interior of the casing, and the second duct com-- municatin with the first duct and with the exterior o the casing.

2. In develo ing apparatus for strips of photographic lms or the-like, an annular casing, a drum adapted to rotate within the casing, a cap member for closing the casing and also serving as a bearing member for the drum, and a-plurality of radial-ducts formed in the casing, each duct communicating with an annular channel, one duct communicating with the exterior of the casin and an adjacent duct communicating with the interior of the. casing.

3. In developing apparatus for strips of photographic films or the like, an annular casing, a base member and a cap member, a drum rotatably heldbythe base and cap members, a light-tight aperture in the easing for the passage of the film, a slot in the drum, and clamping means .for holding a film within said slot, and means for permitting the passage of'liquid from the point exterior of the casing to a=.point interior thereof and comprising a duct formed in one of the cap and base members; said ducthaving a passa eway leading exteriorly of the member, a not within said member and having a passageway leading to the interior of the member, the two ducts communicat-' ing with .each other insuch manner that the liquid passes through one duct' in a direction substantially opposite to its passage inthe other duct.

4, .In photographic apparatus, a developing device, comprising an-annular casing, a

drum, a base member closing the bottom of drum, a cap member closing the top oitlie caslng and affording a second bearing for the drum, a plurality of radial ducts formed in one of said members, alternate, ducts'communicating with the interior of the casing and the remaining ducts. communicating communication between the ducts.

5. A device constructed in accordance I with claim 4, including meansfor holding the parts in assembledv position, comprising a depending threaded extension on the drum, a vnut'carried by said extension, a knob disposed at thetop of the drum and overhanging the cap member and a shoul- -.dered;.stud threaded in the drum axially thereof and serving to clamp the. knob rig-- idlytothedrum.

6. A device constructed in accordance vided with a series of depending projections for supporting the dance in such manner that liquid may enter the ducts from below.

"with-the exterior of the casing, a passage-, I way being formed in said member forinter- 7. In a device of the character described, verse directions to first wind in the film and a light-proof casing having a passageway secondly to spread the convolutions of film for the admission of liquid, a drum within to permit the action of the liquid on the 10 the casing, means whereby a photographic film surface. 5 film or the like may be passed through the i In testimony whereof, I have signed my casing and clamped at the drum, and means name to this specification.

'- whereby the drum may be rotated in re- ANATOL M. JOSEPHO. 

